Lots of good suggestions here.
I'd throw my wish into the improved BGS/PowerPlay. I really want to get invested in a system or a power and have some fun. Coupled with this would be an improvement of the mission system. Like so much in this game missions are just hollow with a coat of RNG paint on them.
I would feel bad not mentioning exploration too! Such a huge awesome looking galaxy with no real reason to see it. I would love if they added some type of planet survey scanning meta where you land (or fly low enough) on a planet and discover geological features (mineral seams, gas wells, giant lakes, etc.) that you could scan and sell data from. Extraction systems pay more for minerals, tourism for wondrous sites, or what have you. Add a bonus in credits/rep or something more interesting depending on the formations distance from the system you sell the scan data too.